Grab-bucket.



G. MUELLER.

GRAB BUCKET.

APPLICATION mu) SEPT. 2. 1915.

1,2005221. Patented ()ot. 3,1916.

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@MMM G. MUELLER.

GRAB BUCKET.

APPLICATION men SEPT. 2. 1915.

- 1,200,221. Patented Oct. 3,1916.

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G. MUELLER.

GRAB BUCKET.

APPLICATION FILED SEPT. 2. 1915. 1,200,221.

' Patentd Oct. 3,1916.

3 SHEETS-SHEET 3- 2/ l M L I I II 2 I 27 ll 25 25 l, I/ 2.5 W 1/ 1/ s r81 GUSTAVE MUELLER, OF CLEVELAND, OHIO.

GRAB-BUCKET.

Specification of Letters Patent.

Patented Oct. 3, 1916.

Application filed September 2, 1915. Serial N 0. 48,607.

T 0 all whom it may concern:

- Be it known that I, GUSTAVE MUELLER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Grab-Buckets, of which the following is a specification.

This invention relates to grab-buckets of the clam-shell type, used especially for dredging and excavating operations, the bucket being opened, closed, and hoisted by means of opening and hoisting cables run ning over sheaves on the bucket.

The particular feature of the invention is a novel construction of counterweight, which acts as a beam between the buckets, and which also serves for the connection of the lower set of closing sheaves. The counterweight is recessed, and the sheaves and their supporting plates are set in this recess, the plates being pivotally connected to the counterweight by a pin or the like which is located below the axis of the pins by which the bucket-sections are hinged to the weight.

A further feature of the invention is an improved construction of the upper head, which carries the upper sheaves.

One of the objects of the arrangement is to set the sheaves so that a compact structure will result, and the upper and lower sheaves may be drawn closer together than in former constructions, which is desirable .in shallow work.

6 indicates the bucket-sections having projecting cars? at their inner corners, by means of which they are hinged together and to the counterweight. Links 8 connect the outer corners of the buckets to the upper head.

0 The counterweight 9 has upwardly proecting brackets 10 secured to its ends by a long pin 11 which passes through the counterweight, and the ears of the buckets are pivoted by pins 12 which extend through the brackets and into the ends of the counterweight, where they are held by screws 13. The counterweight is recessed on its upper side as indicated at 14:, to receive the lower set of sheaves 15 and their plates 16, to which they are connected by a cross-shaft 17. The lower ends of the plates project into slots 18 formed in the counterweight below the re cess, and the long pin 11 serves to pivotally connect the plates to the counterweight. It will be noted that the axis of the pins 12 by means of which the buckets are con nected to the counterweight, is above the pivotal connection of the plates 16, whereby the sheaves are compactly arranged inthe middle part of the counterweight.

The upper head comprises a pair of members 19 which have upwardly projecting and overhanging brackets 20 to which the arms 8 are connected by pivot-pins 21. The members 19 are connected by bolts 22 which also extend through the sheave-plates 23, whereby the latter are connected to the head, spacers 2 1 being sleeved on the bolts to hold the plates the proper distance apart. These plates depend or extend downwardly from the side members, and the two middle plates are extended upwardly-as indicated at 25, to connect the hoisting sheave 26, which turns on a pin 2'? connecting the upper ends of the sheaves. The brackets 20 are set askew with respect to the'sheaves, so that the closing cable 29 may run in line with the lower sheaves. The usual hoisting cable 30 runs over the top sheave.

Having described my invention what I claim is:

1. The combination with bucket-sections, of a counterweight to the ends of which they are hinged, the middle part of the counterweight being recessed, and sheaves and their supporting plates located in the recess, the plates being pivoted at thelr lower ends to the counterweight, the pivot of the plates being below the axis of the upwardly to support an upper or hoisting bucket hinges. sheave. 10 2. An upper head for grab-buckets, com- In testimony whereof I aflix my signature prising a pair of side members having up in presence of two Witnesses. \varclly projecting brackets to Which bueket- GUSTAVE MUELLER.

arms may be pivoted, and depending sheave Witnesses: plates clamped between said members, the JOHN A. BOMMHARDT, middle sheave plates being also extended J. B. DAWS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

